LONDON/ STOCKHOLM/ TOKYO-Sweden's Ericsson apologized and said it was working hard to fix a software glitch that was responsible for millions of smartphone users in Britain, Japan and other countries losing Internet access on Thursday.
One of the largest United Kingdom phone networks, O2, is investigating a network outage that has rendered mobile data inaccessible to the company's 25 million customers.
The problem has also hit customers of Sky Mobile, Tesco Mobile, Lyca Mobile and GiffGaff - all of which use O2's infrastructure.
After a day without 3G and 4G data connections, O2 service seems to be back up in Nottingham.
Ericsson's President and Chief Executive Borje Ekholm said: "The faulty software that has caused these issues is being decommissioned and we apologize not only to our customers but also to their customers".More news: George H W Bush, 94, has died - family say
"We will continue to work with Ericsson through the night, who have assured us that a full service will be restored for customers by the morning".
The company said one of their third party suppliers had identfied a software issue in their system.
Mobile network O2 says its services have been restored after a technical fault left millions of customers unable to get online.
"An initial root cause analysis indicates that the main issue was an expired certificate in the software versions installed with these customers", Ericsson said. "SoftBank will work together with Ericsson and investigate this issue to prevent further recurrence", SoftBank said in a statement. They're now working hard to resolve the issue so we would imagine it won't be too long before its back up. "We fully appreciate it's been a poor experience and we are really sorry".
In cases where you have been without service for some time, you may also have the right to leave the contract without penalty.